Method of designing a multiplexing structure for resource allocation to support legacy system

ABSTRACT

New multiplexing UL structures for supporting legacy system are provided. A 16m system of diversity mode can be multiplexed with 16e system in PUSC mode in FDM manner with the same tiles/permutation rules. A 16m system can be multiplexed with 16e system in AMC mode in FDM and/or TDM manner. The time length of multiplexed 16e PUSC packets and/or 16m packets can be extended to more than two sub-frames for UL coverage. A PRU for 16m system may consists of 16 sub-carriers by 6 OFDMA symbols, 18 sub-carriers by 6 OFDMA symbols, or 20 sub-carriers by 6 OFDMA symbols when FDM is used.

CROSS REFERENCE TO RELATED APPLICATIONS

This application claims the benefit of U.S. Provisional Application Ser.Nos. 61/046,779, filed on Apr. 21, 2008, 61/055,471, filed on May 23,2008, 61/056,427, filed on May 27, 2008, and 61/056,835, filed on May29, 2008, the contents of which are hereby incorporated by referenceherein in their entirety.

This application claims the benefit of the Korean Patent Application No.10-2009-0031268, filed on Apr. 10, 2009, which is hereby incorporated byreference as if fully set forth herein.

BACKGROUND OF THE INVENTION

1. Field of the Invention

The present invention relates to a method of designing multiplexingstructures for resource allocation to support legacy system,specifically relates to uplink resource unit and a distributed resourceallocation method.

2. Discussion of the Background Art

The 802.16m amendment has been developed in accordance with the P802.16project authorization request (PAR), as approved on 6 Dec. 2006, andwith the Five Criteria Statement in IEEE 802.16-06/055r3. According tothe PAR, the standard may be developed as an amendment to IEEE Std.802.16. The 802.16m amendment may provide continuing support for legacyWirelessMAN-OFDMA equipment.

In a conventional IEEE 802.16e system, a basic slot structure and dataregion is defined as follows: a ‘slot’ in the OFDMA (OrthogonalFrequency Division Multiple Access) PHY requires both time andsub-channel dimension for completeness and serves as the minimumpossible data allocation unit. The definition of an OFDMA slot dependson the OFDMA symbol structure, which varies for UL (UpLink) and DL(DownLink), for FUSC (Full Usage of Sub-Channels) and PUSC (PartialUsage of Sub-Channels), and for the distributed sub-carrier permutationsand the adjacent sub-carrier permutation (AMC).

For DL FUSC and DL optional FUSC using the distributed sub-carrierpermutation, one slot is one sub-channel by one OFDMA symbol. For DLPUSC using the distributed sub-carrier permutation, one slot is onesub-channel by two OFDMA symbols. For UL PUSC using either of thedistributed sub-carrier permutations and for DL TUSC1 (Tile Use ofSub-Channels 1) and TUSC2, one slot is one sub-channel by three OFDMAsymbols. For the adjacent sub-carrier permutation (AMC), one slot is onesub-channel by two, three, or six OFDMA symbols.

In OFDMA, a data region is a two-dimensional allocation of a group ofcontiguous sub-channels, in a group of contiguous OFDMA symbols. All theallocation refers to logical sub-channels. A two-dimensional allocationmay be visualized as a rectangle, such as shown in FIG. 1.

In the related art, basic data allocation structures and/or pilotstructures are different according to permutation rules such as PUSC,FUSC, AMC, etc. This is because permutation rules were separated in thetime axis in the related art 16e system so that the structures weredesigned to be optimized according to each permutation rule. FIG. 2shows an exemplary related art data allocation structure. Permutationrules are separated in time axis in the related art method. However, ifmore than one permutation rules exist on the same sub-frame, one unifiedbasic data allocation structure and pilot transmission structure arerequired.

When multiplexing 16e system and 16m system, it is desirable to designtime-frequency granularity of a PRU of a 16m system so that the PRU ofthe 16m system is compatible with a 16e system. In addition, it isdesirable to design multiplexing structures such that performancedeterioration of each of the 16e and the 16m system, which aremultiplexed together, be made as low as possible.

SUMMARY OF THE INVENTION

Technical problems addressed by the present invention is in providing16m and 16e multiplexing structures that provide optimum performance oflegacy system and new systems, and in providing unified basic dataallocation structure and/or pilot transmission structure.

To solve the technical problem, a novel and useful 16m and 16emultiplexing structure is provided in various forms according to thepresent invention. Further, a unified basic data allocation structureand/or pilot transmission structure is provided for a communicationsystem adopting different permutation rules separated in frequency axis.

In one aspect of the invention, there is a method of communicating databetween a mobile communication device and a base station. The methodincludes frequency multiplexing a tile of a first communication modewith a tile of a second communication mode to create a frequencymultiplexed sub-frame or sub-frame group. The tile of the firstcommunication mode comprises X₁ contiguous subcarriers and Y₁ contiguousOFDMA symbols. The tile of the second communication mode comprises X₂contiguous subcarriers and Y₂ contiguous OFDMA symbols. X1=X2 and Y2 isa multiple of Y1.

In one aspect of the invention, the multiple is an integer multiple(e.g., 2, such that X1=X2=4, Y1=3, and Y2=6).

In one aspect of the invention, the first communication mode includesPUSC (Partial Usage of Sub-Channels) sub-channelization.

In one aspect of the invention, the second communication mode includestile permutation.

In one aspect of the invention, the method further includes timedivision multiplexing the frequency multiplexed sub-frame or sub-framegroup with a second sub-frame or sub-frame group of a thirdcommunication mode, where the third communication mode may includeadjacent sub-carrier permutation (AMC) or distributed sub-carrierpermutation.

In one aspect of the invention, the method includes frequencymultiplexing a Physical Resource Unit (PRU) of a third communicationmode with a PRU of a fourth communication mode to create a secondfrequency multiplexed sub-frame or sub-frame group; and time divisionmultiplexing the frequency multiplexed sub-frame or sub-frame group withthe second frequency multiplexed sub-frame or sub-frame group. The PRUof the third communication mode includes X₃ contiguous subcarriers andY₃ contiguous OFDMA symbols. The PRU of the fourth communication modeincludes X₄ contiguous subcarriers and Y₄ contiguous OFDMA symbols.X3=X4 and Y4 is a multiple of Y3 (e.g., x3=18, y3=3, and y4=6.)

In one aspect of the invention, the third communication mode includesadjacent sub-carrier permutation (AMC), and the fourth communicationmode comprises adjacent sub-carrier permutation (AMC) and distributedsub-carrier permutation.

In another aspect of the invention, there is a method of communicatingdata between a mobile communication device and a base station. Themethod includes frequency demultiplexing a frequency multiplexedsub-frame or sub-frame group to form a tile of a first communicationmode and a tile of a second communication mode. The tile of the firstcommunication mode comprises X₁ contiguous subcarriers and Y₁ contiguousOFDMA symbols. The tile of the second communication mode comprises X₂contiguous subcarriers and Y₂ contiguous OFDMA symbols. X1=X2 and Y2 isa multiple of Y1.

In another aspect of the invention, there is a mobile communicationdevice configured to wirelessly communicate with a base station. Themobile communication device includes a RF unit; and a processoroperatively connected to the RF unit and configured to frequencymultiplex a tile of a first communication mode with a tile of a secondcommunication mode to create a frequency multiplexed sub-frame orsub-frame group. The tile of the first communication mode comprises X₁contiguous subcarriers and Y₁ contiguous OFDMA symbols. The tile of thesecond communication mode comprises X₂ contiguous subcarriers and Y₂contiguous OFDMA symbols. X1=X2 and Y2 is a multiple of Y1.

In another aspect of the invention, there is a base station configuredto wirelessly communicate with a mobile communication device. The basestation includes a RF unit; and a processor operatively connected to theRF unit and configured to frequency demultiplex a frequency multiplexedsub-frame or sub-frame group to form a tile of a first communicationmode and a tile of a second communication mode. The tile of the firstcommunication mode comprises X₁ contiguous subcarriers and Y₁ contiguousOFDMA symbols. The tile of the second communication mode comprises X₂contiguous subcarriers and Y₂ contiguous OFDMA symbols. X1=X2 and Y2 isa multiple of Y1.

With the multiplexing scheme and/or the data allocation structure of thepresent invention, the negative interaction between a legacy system anda new system is minimized.

The frequency multiplexed sub-frame group, the second sub-frame group ofa third communication mode, and the second frequency multiplexedsub-frame group may be comprised of one sub-frame or a plurality ofsub-frames, respectively.

DESCRIPTION OF THE DRAWINGS

The accompanying drawings, which are included to provide a furtherunderstanding of the invention, illustrate embodiments of the inventionand together with the description serve to explain the principle of theinvention.

In the drawings:

FIG. 1 shows a diagram for comparing performance in terms of diversitygain according to combinations of packet sizes and available bandwidthsfor a user.

FIG. 2 shows an exemplary related art data allocation structure.

FIG. 3 shows an exemplary logical multiplexing structure according toone embodiment of the present invention.

FIG. 4 shows an exemplary logical multiplexing structure according toone embodiment of the present invention.

FIG. 5 shows an exemplary logical multiplexing structure according toone embodiment of the present invention.

FIG. 6 shows an exemplary logical multiplexing structure according toanother embodiment of the present invention when a legacy systemoperates only in PUSC mode for UL sub-frames.

FIG. 7 shows an exemplary logical multiplexing structure according toanother embodiment of the present invention when a legacy systemoperates in both PUSC and AMC mode for UL sub-frames.

FIG. 8 shows an exemplary logical multiplexing structure according toanother embodiment of the present invention when a legacy systemoperates only in PUSC mode for UL sub-frames.

FIG. 9 shows an exemplary logical multiplexing structure according toanother embodiment of the present invention when a legacy systemoperates both in PUSC and AMC mode for UL sub-frames.

FIG. 10 shows an exemplary logical multiplexing structure according toanother embodiment of the present invention when a legacy systemoperates only in PUSC mode for UL sub-frames.

FIG. 11 shows an exemplary logical multiplexing structure according toanother embodiment of the present invention when a legacy systemoperates both in PUSC and AMC mode for UL sub-frames.

FIG. 12 and FIG. 13A respectively show an exemplary physicalmultiplexing structure of the logical multiplexing structure of FIG. 10and FIG. 11, respectively.

FIGS. 13B and 13C show methods for multiplexing and demultiplexing theframes shown in FIG. 13A.

FIG. 14 shows an exemplary logical multiplexing structure according toanother embodiment of the present invention when a legacy systemoperates both in PUSC and AMC mode for UL sub-frames.

FIG. 15 shows an exemplary multiplexing structure according to anotherembodiment of the present invention when a legacy system operates bothin PUSC and AMC mode for UL sub-frames.

FIG. 16 shows an exemplary multiplexing structure according to anotherembodiment of the present invention when a legacy system operates bothin PUSC and AMC mode for UL sub-frames.

FIG. 17 shows an exemplary multiplexing structure according to anotherembodiment of the present invention when a legacy system operates bothin PUSC and AMC mode for UL sub-frames.

FIG. 18 shows an exemplary data allocation structure related to aunified basic data allocation structure and/or pilot transmissionstructure.

FIG. 19 shows an exemplary design of PRU for resource allocation.

FIG. 20 shows a PRU according to an embodiment of the present invention.

FIG. 21 shows a PRU according to another embodiment of the presentinvention.

FIG. 22 shows a PRU according to another embodiment of the presentinvention.

FIG. 23 shows a structure of a wireless communication system accordingto an embodiment of the invention.

FIG. 24 is a block diagram showing constitutional elements of a userequipment according to an embodiment of the invention.

DETAILED DESCRIPTION OF THE INVENTION

Reference will now be made in detail to the exemplary embodiments of thepresent invention, examples of which are illustrated in the accompanyingdrawings. The detailed description, which will be given below withreference to the accompanying drawings, is intended to explain exemplaryembodiments of the present invention, rather than to show the onlyembodiments that can be implemented according to the invention. Thefollowing detailed description includes specific details in order toprovide a thorough understanding of the present invention. However, itwill be apparent to those skilled in the art that the present inventionmay be practiced without such specific details. For example, thefollowing description will be given centering on specific terms, but thepresent invention is not limited thereto and any other terms may be usedto represent the same meanings.

In this document, “Legacy MS” refers to a mobile station (MS) compliantwith the WirelessMAN-OFDMA Reference System, “Legacy BS” refers to a BScompliant with the WirelessMAN-OFDMA Reference System, “IEEE 802.16m MS”refers to a MS compliant with the Advanced Air Interface specified byIEEE 802.16-2004 and amended by IEEE 802.16e-2005 and IEEE 802.16m, and“IEEE 802.16m BS” refers to a BS compliant with the Advanced AirInterface specified by IEEE 802.16-2004 and amended by IEEE 802.16e-2005and IEEE 802.16m. The entire contents of each of these documents areincorporated herein by reference.

IEEE 802.16m may provide continuing support and interoperability forlegacy WirelessMAN-OFDMA equipment, including MSs (Mobile Station) andBSs (Base Station). Specifically, the features, functions and protocolsenabled in IEEE 802.16m may support the features, functions andprotocols employed by WirelessMAN-OFDMA legacy equipment. IEEE 802.16mmay provide the ability to disable legacy support.

The backward compatibility may satisfy following requirements:

An IEEE 802.16m MS shall be able to operate with a legacy BS, at a levelof performance equivalent to that of a legacy MS.

Systems based on IEEE 802.16m and the WirelessMAN-OFDMA Reference Systemshall be able to operate on the same RF (Radio Frequency) carrier, withthe same channel bandwidth; and should be able to operate on the same RFcarrier with different channel bandwidths.

An IEEE 802.16m BS shall support a mix of IEEE 802.16m and legacy MSswhen both are operating on the same RF carrier. The system performancewith such a mix should improve with the fraction of IEEE 802.16m MSsattached to the BS.

An IEEE 802.16m BS shall support handover of a legacy MS to and from alegacy BS and to and from IEEE 802.16m BS, at a level of performanceequivalent to handover between two legacy BSs.

An IEEE 802.16m BS shall be able to support a legacy MS while alsosupporting IEEE 802.16m MSs on the same RF carrier, at a level ofperformance equivalent to that a legacy BS provides to a legacy MS. Tosupport backward compatibility, multiplexing of 16e and 16m within asame subframe or frame is required. Such a multiplexing can be performedby two multiplexing schemes, that is, TDM and/or FDM. TDM is beneficialin that full flexibility for 16m system optimization is supported.However, TDM may have the defect of link budget loss of legacy. On theother hand, FDM is beneficial in that no impact in terms of link budgetoccurs on legacy system. However, FDM may have the defect that 16msub-channelization is restricted due to co-existence of 16e PUSC(partial usage of subchannels) in the same sub-frame. Specifically, TDMscheme may have technical problem of implementation when AMC mode isused in 16e legacy system. On the other hand, FDM scheme may havetechnical problem of implementation when PUSC mode is used in 16e legacysystem.

FIG. 3 shows an exemplary logical multiplexing structure according toone embodiment of the present invention.

Referring to FIG. 3, the zone 301, 302, and 303 consists of one (1)sub-frame, respectively. Zone 303 is reserved only for ‘16m allocationfor all types’. ‘16m allocation for all types’ includes allocation of16m localized resource units and allocation of 16m distributed resourceunits. The resources for ‘16e PUSC’ is multiplexed with the resourcesfor ‘16m allocation for all types’ or separated from the resources for‘16e AMC’ in TDM manner. And, the resources for ‘16e AMC’ is multiplexedwith the resources for ‘16m allocation for all types’ in TDM and/or FDMmanner. Further, the resources for ‘16e AMC’ and the resources for ‘16mallocation for all types’ are multiplexed in zone 302 in FDM manner.However, according to the multiplexing structure of FIG. 3, there mightbe a legacy coverage loss because the time span of zone 301 for 16esystem is limited by TDM scheme.

FIG. 4 shows an exemplary logical multiplexing structure according toanother embodiment of the present invention.

Referring to FIG. 4, zone 401 for ‘16e PUSC’ and “16m distributedresource unit (DRU) with 16e tiles/permutation rule” consists of two (2)sub-frames. Zone 402 is reserved only for ‘16m allocation for alltypes’, and consists of one (1) sub-frame. The resources for ‘16e PUSC’and the resources for “16m distributed resource unit (DRU) with 16etiles/permutation rule” are multiplexed in zone 401 in FDM manner.

FIG. 5 shows an exemplary logical multiplexing structure according toanother embodiment of the present invention.

Referring to FIG. 5, zone 502 is reserved for ‘16m allocation for alltypes’ and ‘16e AMC’, and consists of one (1) sub-frame. Zone 501 isreserved for ‘16e PUSC’ and “16m distributed resource unit (DRU) with16e tiles/permutation rule,” and consists of two (2) sub-frames.

Referring back to FIG. 4, it is shown that there exists only ‘16m’ inzone 402. With the multiplexing structure of FIG. 4 or FIG. 5, legacycoverage can be extended because the time span of the ‘16e PUSC’ zone401 or 501 is rather longer than that of the multiplexing structure ofFIG. 3. However, according to the structure of FIG. 4 and FIG. 5, 16msystem complexity may increase due to two distributed permutation rules.In these structures, if UL has three (3) sub-frames, the size of the‘16e PUSC’ zone 401 and 501 may consist of two (2) sub-frames forsupporting legacy coverage, and if UL has four (4) sub-frames, the sizeof the ‘16e PUSC’ zone 401 and 501 may consist of three (3) sub-framesfor supporting legacy coverage.

FIG. 6 shows an exemplary logical multiplexing structure according toanother embodiment of the present invention when a legacy systemoperates only in PUSC mode for UL sub-frames. In this multiplexingstructure, the resources for ‘16e PUSC’ and the resources for ‘16mallocation for all types’ are multiplexed in TDM manner for legacysupport. According to the multiplexing structure of FIG. 6, the negativeeffect of legacy 16e system on 16m resource allocation can be minimizedbecause the frequency granularity of 16m resource allocation unit is notinfluenced by 16e legacy system. Further, in this case, if a UL PRU(Physical Resource Unit) consists of 18 sub-carriers by 6 OFDMA symbols,the UL PRU can be easily applied to the multiplexed structure because ithas commonality with DL PRU.

FIG. 7 shows an exemplary logical multiplexing structure according toanother embodiment of the present invention when a legacy systemoperates in both PUSC and AMC mode for UL sub-frames. In thismultiplexing structure, the resources for ‘16e PUSC’ and the resourcesfor ‘16m allocation for all types’ are multiplexed in TDM manner, and‘16e PUSC’ and ‘16e AMC’ are separated in TDM manner. On the other hand,the resources for ‘16e AMC’ and the resources for ‘16m allocation forall types’ are multiplexed in FDM manner in the same zone 701.

FIG. 8 shows an exemplary logical multiplexing structure according toanother embodiment of the present invention when a legacy systemoperates only in PUSC mode for UL sub-frames. In this multiplexingstructure, the resources for ‘16m allocation for all types’ and theresources for ‘16e PUSC’ are always multiplexed in TDM manner, and a PRUof 18 sub-carriers by 6 OFDMA symbols can be used for 16m resourceallocation without modification. Referring to FIG. 8, the multiplexingstructure may consist of three (3) UL sub-frames 801, 802, and 803, and‘16e PUSC’ is allocated in one (1) sub-frame 801. It should be notedthat the present invention is not limited by the specific time length ofeach zone 801, 802, or 803.

FIG. 9 shows an exemplary logical multiplexing structure according toanother embodiment of the present invention when a legacy systemoperates both in PUSC and AMC mode for UL sub-frames. In thismultiplexing structure, the resources for ‘16m allocation for all types’and the resources for ‘16e PUSC’ are always multiplexed in TDM manner,the resources for ‘16m allocation for all types’ and the resources for‘16e AMC’ are always multiplexed in FDM manner, and a PRU of 18sub-carriers by 6 OFDMA symbols can be used for 16m resource allocationwithout modification. Referring to FIG. 9, the multiplexing structuremay consist of three (3) UL sub-frames 901, 902, and 903, and ‘16e PUSC’is allocated in one (1) sub-frame 901; however, it is apparent that thepresent invention is not limited by the exemplary structure of FIG. 9.

FIG. 10 shows an exemplary logical multiplexing structure according toanother embodiment of the present invention when a legacy systemoperates only in PUSC mode for UL sub-frames. In this multiplexingstructure, the resources for ‘16m’ and the resources for ‘16e PUSC’ aremultiplexed both in TDM and FDM manner. In zone 1001, the resources for‘16m’ can be multiplexed with the resources for ‘16e PUSC’ in FDM mannerif ‘16m’ supports the same tiles/permutation rule as the 16etiles/permutation rules or supports granularity which is compatible withthe granularity of ‘16e PUSC’, when part of zone 1001 remains emptyafter ‘16e PUSC’ allocation. However, the resources for ‘16m allocationfor all types’ can be multiplexed with the resources for ‘16e PUSC’ inTDM manner in zone 1002.

FIG. 11 shows an exemplary logical multiplexing structure according toanother embodiment of the present invention when a legacy systemoperates both in PUSC and AMC mode for UL sub-frames. In thismultiplexing structure, the resources for ‘16m’ and the resources for‘16e PUSC’ are multiplexed both in TDM and FDM manner, and the resourcesfor ‘16m allocation for all types’ and the resources for ‘16e AMC’ aremultiplexed in FDM manner. In zone 1101, the resources for ‘16m’ can bemultiplexed with the resources for ‘16e PUSC’ in FDM manner if ‘16m’supports the same tiles/permutation rule as the 16e tiles/permutationrules or supports granularity which is compatible with the granularityof ‘16e PUSC’, when part of zone 1101 remains empty after ‘16e PUSC’allocation. However, the resources for ‘16m allocation for all types’can be multiplexed with the resources for ‘16e AMC’ in FDM manner inzone 1102. Meanwhile, the resources for ‘16m’ in zone 1102 can bemultiplexed with the resources for ‘16e PUSC’ in TDM manner. Themultiplexing structure of FIG. 11 is beneficially applicable in anenvironment where a number of allocation modes such as ‘16e AMC’, ‘16ePUSC’, ‘16m distributed resource unit (DRU) mode’, and ‘16m localizedmode’ should be allocated in a single time zone. FIG. 12 and FIG. 13Arespectively show an exemplary physical multiplexing structure of thelogical multiplexing structure of FIG. 10 and FIG. 11, respectively.

In the physical domain shown in FIGS. 12-13A, the 16e region and the 16m(with diversity) region of FIGS. 10-11, respectively, may be interlacedby a predetermined rule (e.g., the 16e PUSC permutation rule). Frequencygranularity of the 16e region PUSC mode may be based on the use of 4×3tiles. In one example, by adding two 4×3 tiles to create a composite 4×6tile for the 16e mode, and by restricting the 16m mode to have tiles ofsize 4×6, a common tile structure (i.e., 4×6) may be used in both the16e and 16m (with diversity) regions. These commonly sized tilesstructures may be interlaced in the frequency domain in anypredetermined order (e.g., 16e followed by one or more 16m followed byone or more 16e). Interlacing of these specifically sized tiles allowsfor efficient frequency use. These specifically sized tiles may also betime division multiplexed with differently sized tiles (i.e., integermultiples of 4×6), such as tiles for ‘16e AMC’ and/or ‘16m allocationfor all types.’

FIG. 13B shows a pre-transmission method for creating the structuresshown in FIGS. 11 and 13A. Once data is ready to transmit, a devicefrequency multiplexes a tile of a first communication mode with a tileof a second communication mode to create a frequency multiplexedsub-frame (or sub-frame group)(S1) to create the sub-frame (or sub-framegroup) 1101 of FIG. 11. The tile of the first communication mode mayinclude X₁ contiguous subcarriers and Y₁ contiguous OFDMA symbols. Thetile of the second communication mode may include X₂ contiguoussubcarriers and Y₂ contiguous OFDMA symbols. The multiple may be aninteger multiple (e.g., 2, such that X1=X2=4, Y1=3, and Y2=6). The firstcommunication mode may include PUSC (Partial Usage of Sub-Channels)sub-channelization. The second communication mode may include tilepermutation.

Optionally, the device time division multiplexes the frequencymultiplexed sub-frame (or sub-frame group) with a second sub-frame (orsub-frame group) of a third communication mode (e.g., one of thesubframes 1102 of FIG. 11) (S2). The third communication mode mayinclude adjacent sub-carrier permutation (AMC) or may includedistributed sub-carrier permutation.

In another option, the device frequency multiplexes a Physical ResourceUnit (PRU) of a third communication mode with a PRU of a fourthcommunication mode to create a second frequency multiplexed sub-frame(or sub-frame group) (e.g., to create one of the subframes 1102 of FIG.11)(S3). Optionally, the device then time division multiplexes thefrequency multiplexed sub-frame (or sub-frame group) with the secondfrequency multiplexed sub-frame (or sub-frame group) (S4). The PRU ofthe third communication mode may include X₃ contiguous subcarriers andY₃ contiguous OFDMA symbols. The PRU of the fourth communication modecomprises X₄ contiguous subcarriers and Y₄ contiguous OFDMA symbols. Inone option, X3=X4 and Y4is a multiple of Y3 (e.g., x3=18, y3=3, andy4=6). The third communication mode may include adjacent sub-carrierpermutation (AMC), and the fourth communication mode may includedistributed sub-carrier permutation.

The method of FIG. 13C is the inverse of FIG. 13B. FIG. 13C shows a postreception method for creating the structures shown in FIGS. 11 and 13A.Once data is received (S5), a device frequency demultiplexes a frequencymultiplexed sub-frame (or sub-frame group) to form a tile of a firstcommunication mode and a tile of a second communication mode (S6).Optionally, the device time division demultiplexes received data toobtain the frequency multiplexed sub-frame (or sub-frame group) and asecond sub-frame (or sub-frame group) of a third communication mode(S7). Alternatively, the device time division demultiplexes data toobtain the frequency multiplexed sub-frame (or sub-frame group) and asecond frequency multiplexed sub-frame (or sub-frame group) (S8). Withthis alternative, the device may also frequency demultiplex the secondfrequency multiplexed sub-frame (or sub-frame group) to form a PhysicalResource Unit (PRU) of a third communication mode and a PRU of a fourthcommunication mode (S9) in addition to frequency demultiplexing thefrequency multiplexed sub-frame (or sub-frame group) to form a tile of afirst communication mode and a tile of a second communication mode (S6).

FIG. 14 shows an exemplary logical multiplexing structure according toanother embodiment of the present invention when a legacy systemoperates both in PUSC and AMC mode for UL sub-frames. In thismultiplexing structure, the resources for ‘16e PUSC’ is separated fromthe resources for ‘16e AMC’ in TDM manner as in conventional methods,and the resources for ‘16m’ is multiplexed with the resources for ‘16ePUSC’ and the resources for ‘16e AMC’ in TDM manner. According to themultiplexing structure of FIG. 14, the negative effect of legacy 16esystem on 16m resource allocation can be minimized because the frequencygranularity of 16m resource allocation is not influenced by the 16elegacy system. Further, in this case, if a UL PRU (Physical ResourceUnit) consists of 18 sub-carriers by 6 OFDMA symbols, the UL PRU can beeasily applied to the multiplexed structure because it has commonalitywith DL PRU.

FIG. 15 shows an exemplary multiplexing structure according to anotherembodiment of the present invention when a legacy system operates bothin PUSC and AMC mode for UL sub-frames. Referring to FIG. 15, it isshown that zone 1503 is reserved only for ‘16m allocation for alltypes’, and may consists of one or more sub-frames. In zone 1503, theresources for ‘16m’ can be multiplexed in TDM manner both with theresources for ‘16e PUSC’ and the resources for ‘16e AMC’. In thismultiplexing structure, the resources for ‘16e PUSC’ is multiplexed withthe resources for ‘16m allocation for all types’ in TDM manner, and theresources for ‘16e AMC’ may be multiplexed with the resources for ‘16mallocation for all types’ in TDM and/or FDM manner.

According to the multiplexing structure of FIG. 15, the negative effectof legacy 16e system on 16m resource allocation can be minimized becausethe frequency granularity of 16m resource allocation is not influencedby the 16e legacy system. Further, the negative effect of legacy 16esystem on 16m resource allocation can be minimized if the size of thePRU used in zone 1502 is 18 sub-carriers by 6 OFDMA symbols, because thefrequency granularity of ‘16m allocation for all types’ is the same asthat of ‘16e AMC’.

If one or more UL sub-frames are not allocated for ‘16e PUSC’ and ‘16eAMC’, the resources for ‘16m allocation for all types’ can bemultiplexed with the resources for ‘16e AMC’ in TDM manner.

In this case, the ‘16m allocation for all types’ in zone 1502 may nothave sufficient band-scheduling gain or frequency diversity gain because‘16m localized resources’ and ‘16m distributed resources’ in zone 1502are multiplexed in FDM manner with ‘16e AMC’. Therefore, it isadvantageous for the resources for ‘16m allocation for all types’ to bemultiplexed in TDM manner with the resources for ‘16e AMC’ in zone 1503.However, multiplexing ‘16m’ in TDM manner with ‘16e AMC’ may cause ULcoverage problem because the time span for ‘16m’ in zone 1503 may not besufficient. To solve this problem, the sub-frame of zone 1502 may spanor concatenated to the adjacent sub-frame(s) of zone 1503 for 16mallocation. Referring to FIG. 15, the 16m resources multiplexed in FDMmanner with the resources for ‘16e AMC’ may span to adjacent nextsub-frame(s) (A) or not (B), and the 16m resources multiplexed in TDMmanner with ‘16e AMC’ may span to adjacent precedent sub-frame(s) or not(C). Spanning the 16m resources to adjacent sub-frame(s) is advantageousfor cell edge users because it may provide more UL coverage.

According to the multiplexing structure of FIG. 15, the resources for‘16m allocation for all types’ can be multiplexed both in FDM and TDMmanner with the resources for ‘16e AMC’. In other words, hybrid FDM/TDMis supported between 16e AMC and 16m. As a result, a base station canget flexibility for trade-off between UL coverage andband-scheduling/diversity gain. In other words, a base station can getthe flexibility because a zone 1503 which is reserved only for ‘16mallocation for all types’ is provided when legacy system operates bothin PUSC and AMC mode.

FIG. 16 shows an exemplary multiplexing structure according to anotherembodiment of the present invention when a legacy system operates bothin PUSC and AMC mode for UL sub-frames.

The multiplexing structure of FIG. 16 can be regarded as modified fromthe multiplexing structure of FIG. 15. According to FIG. 16, all of theresources for ‘16m allocation for all types’ in zone 1602, which ismultiplexed in FDM manner with the resources for ‘16e AMC’, spans to theadjacent next sub-frame(s) (A). These spanned resources may be allocatedonly for those MSs which are located at cell edge or for those MSs whichhave more concern in power optimization than in band-scheduling gain ordiversity gain. On the other hand, the resources for ‘16m allocation forall types’ in zone 1603 (B), which is multiplexed in TDM manner with theresources for ‘16e AMC’, may be allocated only for those MSs which haveless concern in power optimization or for those MSs which are notlocated in cell edge.

FIG. 17 shows an exemplary multiplexing structure according to anotherembodiment of the present invention when a legacy system operates bothin PUSC and AMC mode for UL sub-frames. Referring to FIG. 17, it isshown that at least part of each sub-frame 1701, 1702, 1703 is allocatedfor either ‘16e PUSC’ or ‘16e AMC’. In this multiplexing structure, theresources for ‘16e PUSC’ is multiplexed with the resources for ‘16mallocation for all types’ in TDM manner, the resources for ‘16e PUSC’ isseparated with the resources for ‘16e AMC’ in TDM manner, and theresources for ‘16e AMC’ may be multiplexed with the resources for ‘16mallocation for all types’ only in FDM manner. Therefore, every resourcefor 16m in zone 1702 has a chance to span to adjacent next sub-frame(s)in zone 1703 for UL coverage increase.

According to the multiplexing structure of FIG. 17, the negative effectof legacy 16e system on 16m resource allocation can be minimized becausethe frequency granularity of 16m resource allocation is not influencedby ‘16e PUSC’. Further, the negative effect of legacy 16e system on 16mresource allocation can be minimized if a PRU of 18 sub-carriers by 6OFDMA symbols is used for ‘16m’ because then frequency granularity of‘16m’ is the same as that of ‘16e AMC’.

According to the present invention, information regarding the zoneconfiguration including resource allocation of 16e or 16m can besignaled to a IEEE 802.16m MS, where the signaling can be a type ofbroadcast signaling. For an example, it can be signaled in which modeamong PUSC and AMC the 16e system operates at each sub-frame. Foranother example, when the resources for ‘16m’ is multiplexed in FDMmanner at a sub-frame where ‘16e’ operates in AMC mode, informationabout resource allocation of ‘16e AMC’ can be signaled to a IEEE 802.16mMS. For still another example, when the resources for ‘16m’ ismultiplexed in FDM manner at a sub-frame where ‘16e’ operates in PUSCmode, information about resource allocation of ‘16e PUSC’ or ‘16m’ canbe signaled to a IEEE 802.16m MS if ‘16m’ supports the sametiles/permutation rule as the 16e tiles/permutation rules or supportsgranularity which is compatible with the granularity of ‘16e PUSC’. Oncethe information about resource allocation of ‘16e PUSC’ is signaled,information about resources that are available for ‘16m’ can also beknown because the resources for ‘16e PUSC’ and the resources for ‘16m’are multiplexed in FDM manner. That is, supposing 10 MHz systembandwidth (=48 PRU), if a total of 20 subchannels are allocated for ‘16ePUSC’, then a total of 28 (=48−20) subchannels are allocated for ‘16m’;therefore information of subchannels which is used for 16e PUSC can beinformed and/or information of subchannels which is available for 16mcan be informed.

According to the present invention, each zone for ‘16e PUSC’, ‘16e AMC’,and ‘16m’ of the multiplexing structure discussed in above embodimentsmay have a time length of one (1) sub-frame or a multiple of one (1)sub-frame. Also, the zone separation can be dependent on the number ofavailable UL sub-frames.

In the above embodiments of the present invention, it was discussed thatit is preferred that ‘16m’ support the same tiles/permutation rule asthe tiles/permutation rule of 16e legacy system or support granularitywhich is compatible with the granularity of ‘16e PUSC’ and/or ‘16e AMC’so as to minimize the negative influence of legacy system on 16m system.According to the present invention, PRUs for 16m which are compatiblewith that of the legacy system in terms of granularity is provided. Thestructure of PRUs according to the present invention will be discussedhereinafter.

The resource dimension of a DL PRU of conventional system is defined by18 sub-carriers by 6 OFDMA symbols. To provide commonality with this DLPRU, the resource dimension of a UL PRU may preferably be defined by 18sub-carriers by 6 OFDMA symbols as the same as in the DL PRU. Theadvantage of adopting the PRU of 18 sub-carriers by 6 OFDMA symbols hasbeen discussed and proven enough in connection with DL PHY structure inthe related industry.

FIG. 18 shows an exemplary UL PHY structure which requires a unifiedbasic data allocation structure and/or pilot transmission structure.Permutation rules are separated in frequency axis in this figure.

Hereinafter, the basic data allocation structure may be referred to asPRU (Physical Resource Unit). A PRU serves as the minimum structure fordata allocation, and serves as a basic data transmission unit whenperforming sub-channelization and data/control information allocation ofa scheduling for data transmission. That is, scheduling for localizedpermutation may take places in units of a multiple of a PRU and a basicdata transmission unit is designed in units of a PRU, while each of asub-carrier, a MRU (mini-PRU), and a PRU can serve as a basic unit fordistributed permutation. For example, in LTE system, the PRU correspondsto a ‘RB’ (Resource Block), and, in conventional 802.16e system, the PRUcorresponds to a ‘slot’. It is necessary to determine granularity of aPRU in frequency and time domain when designing PRU. When a frame isdivided into more than one sub-frames, if the number of OFDMA symbolsconstituting a sub-frame is the same as the number of OFDA symbols of aPRU, the PRU is determined according to the number of sub-carriersconstituting the PRU in frequency domain. If the number of OFDMA symbolsconstituting a sub-frame is not the same as the number of OFDMA symbolsof a PRU, the PRU is determined by the number of OFDMA symbols in timedomain and the number of sub-carriers in frequency domain.

FIG. 19 shows an exemplary design of a PRU for resource allocation.

If there exist more than one legacy support schemes applicable foruplink, that is, if both of TDM legacy support scheme and FDM legacysupport scheme are taken into consideration, different PRUs are requiredaccording to each scheme, respectively. For example, when bothconventional IEEE 802.16e legacy system and IEEE 802.16m new system aresupported for UL frame at the same time, different PRUs are requiredaccording to the multiplexing schemes such as TDM and FDM by whichresources are divided for the conventional and the new system. Inaddition, for PRU designing, it should be considered of a legacydisabled-mode where a UL frame does not support one of the differentsystems, for example, IEEE 802.16e legacy system, and only support theother system, for example IEEE 802.16m new system.

Possible multiplexing scenarios for legacy support are as follows: 1.TDM approached legacy support scenario 2. FDM approached legacy support(in AMC mode) scenario 3. Legacy disabled scenario 4. FDM approachedlegacy support (in PUSC mode) scenario. In the present invention, ULPRUs per each scenario are provided. In particular the structures can beused as a basic data allocation structure for uplink.

FIG. 20 shows a PRU according to an embodiment of the present invention.Referring to FIG. 20, the PRU consists of 18 sub-carriers in frequencyaxis by 6 OFDMA symbols in time axis.

According to the present invention, the PRU of FIG. 20 can be used forthe TDM approached legacy support scenario. The PRU according to FIG. 20is a basic structure of a minimum unit for data allocation, and servesas a basic data transmission unit when performing resource blockchannelization and data/control information allocation for scheduling ofdata transmission. Scheduling may take places in units of a multiple ofa PRU or in units of a PRU according to the present invention. Accordingto the present invention, the total of 108 tones exists in a PRU, partof which may be allocated as data sub-carrier, pilot sub-carrier, or ascontrol signal region. When a new system adopts the basic numerology ofconventional IEEE 802.16e system such that sub-carrier spacing becomes10.9375 kHz, the total 18 number of sub-carriers can have the size of200 kHz which is adequate to band-scheduling, and the number ‘18’ alsocan have many divisors. Therefore, designing a PRU to have a total of 18sub-carriers is beneficial for distributed sub-channelization. Inaddition, designing a PRU to have a total of 6 OFDMA symbols isbeneficial for one-dimensional resource allocation if a transmissionframe of a new system (e.g., IEEE 802.16m) consists of a number ofsub-frames each of which comprised of 6 OFDMA symbols. Further, the PRUof 18 sub-carriers by 6 OFDMA symbols is beneficial for providingcommonality between uplink and downlink when DL PRU consists of 18sub-carriers by 6 OFDMA symbols.

According to the present invention, the PRU of FIG. 20 also can be usedfor the FDM approached legacy support (in AMC mode) scenario. The PRUaccording to FIG. 20 is a basic structure of a minimum unit for dataallocation, and serves as a basic data transmission unit when performingresource block channelization and data/control information allocationfor scheduling of data transmission. Scheduling (i.e., the scope withinwhich control information is allocated) may take places in units of amultiple of a PRU or in units of a PRU according to the presentinvention. According to the present invention, the total of 108 tonesexists in a PRU, part of which may be allocated as data sub-carrier,pilot sub-carrier, or as control signal region. Designing a PRU to have18 sub-carriers is beneficial for supporting conventional AMC-mode whena legacy system is supported with FDM, and is beneficial for distributedsub-channelization because the number ‘18’ has many divisors. Inaddition, designing a PRU to have a total of 6 OFDMA symbols isbeneficial for one-dimensional resource allocation if a transmissionframe of a new system (e.g., IEEE 802.16m) consists of a number ofsub-frames comprised of 6 OFDMA symbols. Further, the PRU of 18sub-carriers by 6 OFDMA symbols is beneficial for providing commonalitybetween uplink and downlink when DL PRU consists of 18 sub-carriers by 6OFDMA symbols.

According to the present invention, the PRU of FIG. 20 also can be usedfor the legacy disabled scenario. The PRU according to FIG. 20 is abasic structure of a minimum unit for data allocation, and serves as abasic data transmission unit when performing resource blockchannelization and data/control information allocation for scheduling ofdata transmission. Scheduling may take places in units of a multiple ofa PRU or in units of a PRU according to the present invention. Accordingto the present invention, the total of 108 tones exists in a PRU, partof which may be allocated as data sub-carrier, pilot sub-carrier, or ascontrol signal region. When a new system adopts the basic numerology ofconventional IEEE 802.16e system such that sub-carrier spacing becomes10.9375 kHz, the total 18 number of sub-carriers can have the size of200 kHz adequate to band-scheduling, and the number ‘18’ also can havemany divisors. Therefore, designing a PRU to have a total of 18sub-carriers is beneficial for distributed sub-channelization. Inaddition, designing a PRU to have a total of 6 OFDMA symbols isbeneficial for one-dimensional resource allocation if a transmissionframe of a new system (e.g., IEEE 802.16m) consists of a number ofsub-frames each of which comprised of 6 OFDMA symbols. Further, the PRUof 18 sub-carriers by 6 OFDMA symbols is beneficial for providingcommonality between uplink and downlink when DL PRU consists of 18sub-carriers by 6 OFDMA symbols.

FIG. 21 shows a PRU according to another embodiment of the presentinvention. Referring to FIG. 21, the PRU consists of 16 sub-carriers infrequency axis by 6 OFDMA symbols in time axis.

According to the present invention, the PRU of FIG. 21 can be used forthe FDM approached legacy support (in PUSC mode) scenario. The PRUaccording to FIG. 21 is a basic structure of a minimum unit for dataallocation, and serves as a basic data transmission unit when performingresource block channelization and data/control information allocationfor scheduling of data transmission. Scheduling may take places in unitsof a multiple of a PRU or in units of a PRU according to the presentinvention. According to the present invention, the total of 96 tonesexists in a PRU, part of which may be allocated as data sub-carrier,pilot sub-carrier, or as control signal region. A new 16m system and theconventional 16e system can co-exist in a UL frame because the total 16sub-carriers in a PRU is a multiple of ‘4’ sub-carriers, which is abasic size used for sub-channelization in the conventional system, suchthat the PRU of FIG. 21 can be easily adopted for numerology commonalityof IEEE 802.16e legacy system.

FIG. 22 shows a PRU according to another embodiment of the presentinvention. Referring to FIG. 22, the PRU consists of 20 sub-carriers infrequency axis by 6 OFDMA symbols in time axis.

According to the present invention, the PRU of FIG. 22 can be used forthe FDM approached legacy support (in PUSC mode) scenario. The PRUaccording to FIG. 22 is a basic structure of a minimum unit for dataallocation, and serves as a basic data transmission unit when performingresource block channelization and data/control information allocationfor scheduling of data transmission. Scheduling may take places in unitsof a multiple of a PRU or in units of a PRU according to the presentinvention. According to the present invention, the total of 120 tonesexists in a PRU, part of which may be allocated as data sub-carrier,pilot sub-carrier, or as control signal region. A new 16m system and theconventional 16e system can co-exist in a UL frame because the total 20sub-carriers in a PRU is a multiple of ‘4’ sub-carriers, which is abasic size used for sub-channelization in the conventional system, suchthat the PRU of FIG. 22 can be easily adopted for numerology commonalityof IEEE 802.16e legacy system.

According to another embodiment of the present invention, change oflegacy support modes can be signaled so that differently sized PRUs (forexample, size of 18*6, 16*6, 20*6 in the present invention) can beapplied according to the changed legacy support mode in an environmentwhere TDM/FDM legacy support modes are supported in the same UL frame,or TDM/FDM legacy support mode as well as legacy disabled mode aresupported in the same multiple-frames or in the same super-frame. Thissignaling can be transmitted via a control channel per frame (e.g.,sub-map) or via a control channel per super-frame (i.e., a bunch ofsub-frames) (e.g., super-map). The signaling may be transmittedperiodically, or may be transmitted on the basis of even-triggering whennecessary.

Table 1 shows an example of an applicable sub-carrier configuration whenthe PRU of 18 sub-carriers by 6 OFDMA symbols according to the presentinvention is used.

TABLE 1 2048 FFT 1024 FFT 512 FFT size size size Number of used sub-1729 865 433 carriers (including DC) Left/Right guard 160/159 80/7940/39 sub-carriers Number of sub-  96  48  24 carriers (Resource blocks)

Table 2 shows an example of an applicable sub-carrier configuration whenthe PRU of 16 sub-carriers by 6 OFDMA symbols according to the presentinvention is used.

TABLE 2 2048 FFT 1024 FFT 512 FFT size size size Number of used sub-1729 865 433 carriers (including DC) Left/Right guard 160/159 80/7940/39 sub-carriers Number of sub-  108  54  27 carriers (Resourceblocks)

According to the PRU of 18 sub-carriers by 6 OFDMA symbols of FIG. 20,the optimum band scheduling performance can be achieved and overheadsignaling for resource allocation is minimized because frequencysub-carrier size beneficial for band scheduling (i.e., 18 sub-carriers)is applied. According to the PRU of 18 or 20 sub-carriers by 6 OFDMAsymbols of FIG. 21 or FIG. 22, flexible sub-channelization is achievablewhen legacy system is supported by FDM.

For UL transmission frame/sub-frame, there are occasions that it isrequired to define a sub-frame (or a set of sub-frames) which is longercompared to DL transmission for various reasons. In this case, accordingto other embodiments of the present invention, the PRUs of FIG. 20 toFIG. 22 may be modified to have 12 OFDMA symbols rather than 6 OFDMAsymbols. Then, the PRU modified from FIG. 20 consists of 18 sub-carriersby 12 OFDMA symbols, and has the total of 216 tones, part of which maybe allocated as data sub-carrier, pilot sub-carrier, or control channelsub-carrier. Similarly, the PRU modified from FIG. 21 consists of 16sub-carriers by 12 OFDMA symbols, and has the total of 192 tones, partof which may be allocated as data sub-carrier, pilot sub-carrier, orcontrol channel sub-carrier, and the PRU modified from FIG. 22 consistsof 20 sub-carriers by 12 OFDMA symbols, and has the total of 240 tones,part of which may be allocated as data sub-carrier, pilot sub-carrier,or control channel sub-carrier.

According to another embodiment of the present invention, a UL PRU mayconsists of 36 sub-carriers by 6 OFDMA symbols which is applicable evenfor the FDM approached legacy support (in PUSC mode) scenario. In theconventional UL 16e system, distributed sub-channelization was difficultto implement because distributed sub-channelization was applied by tyingtiles each of which is comprised of 4 sub-carriers, and because ‘4’ isnot a divisor of ‘18’. Therefore, if a PRU consists of 36 sub-carriersby 6 OFDMA symbols, distributed sub-channelization can be implementedfor the conventional UL 16e system because ‘4’ is a divisor of ‘36’. Inthis embodiment, the PRU of 36 sub-carriers by 6 OFDMA symbols can beapplied as a basic allocation unit, or as a pair of PRUs each of whichconsists of 18 sub-carriers by 6 OFDMA symbols.

FIG. 23 shows a structure of a wireless communication system capable ofexchanging the data structures of FIGS. 3-17 and 20-22, including themethod of FIGS. 13B-13C. The wireless communication system may have anetwork structure of an evolved-universal mobile telecommunicationssystem (E-UMTS). The E-UMTS may also be referred to as a long termevolution (LTE) system. The wireless communication system can be widelydeployed to provide a variety of communication services, such as voices,packet data, etc.

Referring to FIG. 23, an evolved-UMTS terrestrial radio access network(E-UTRAN) includes at least one base station (BS) 20 which provides acontrol plane and a user plane.

A user equipment (UE) 10 may be fixed or mobile, and may be referred toas another terminology, such as a mobile station (MS), a user terminal(UT), a subscriber station (SS), a wireless device, etc. The BS 20 isgenerally a fixed station that communicates with the UE 10 and may bereferred to as another terminology, such as an evolved node-B (eNB), abase transceiver system (BTS), an access point, etc. There are one ormore cells within the coverage of the BS 20. Interfaces for transmittinguser traffic or control traffic may be used between the BSs 20.Hereinafter, a downlink is defined as a communication link from the BS20 to the UE 10, and an uplink is defined as a communication link fromthe UE 10 to the BS 20.

The BSs 20 are interconnected by means of an X2 interface. The BSs 20are also connected by means of an S1 interface to an evolved packet core(EPC), more specifically, to a mobility management entity (MME)/servinggateway (S-GW) 30. The S1 interface supports a many-to-many relationbetween the BS 20 and the MME/S-GW 30.

FIG. 24 is a block diagram showing constitutional elements of device 50,that can be either the UE or the BS of FIG. 23, and that is capable ofexchanging the data structures of FIGS. 3-17 and 20-22, including themethods of FIGS. 13B-13C. A UE 50 includes a processor 51, a memory 52,a radio frequency (RF) unit 53, a display unit 54, and a user interfaceunit 55. Layers of the radio interface protocol are implemented in theprocessor 51. The processor 51 provides the control plane and the userplane. The function of each layer can be implemented in the processor51. The processor 51 may also include a contention resolution timer. Thememory 52 is coupled to the processor 51 and stores an operating system,applications, and general files. The display unit 54 displays a varietyof information of the UE 50 and may use a well-known element such as aliquid crystal display (LCD), an organic light emitting diode (OLED),etc. The user interface unit 55 can be configured with a combination ofwell-known user interfaces such as a keypad, a touch screen, etc. The RFunit 53 is coupled to the processor 51 and transmits and/or receivesradio signals.

Layers of a radio interface protocol between the UE and the network canbe classified into a first layer (L1), a second layer (L2), and a thirdlayer (L3) based on the lower three layers of the open systeminterconnection (OSI) model that is well-known in the communicationsystem. A physical layer, or simply a PHY layer, belongs to the firstlayer and provides an information transfer service through a physicalchannel. A radio resource control (RRC) layer belongs to the third layerand serves to control radio resources between the UE and the network.The UE and the network exchange RRC messages via the RRC layer.

Also, one skilled in the art would recognize that, for each of the abovedescribed embodiments, multiple tiles distributed in the frequencydomain may form one distributed resource unit (DRU).

It will be apparent to those skilled in the art that variousmodifications and variations can be made in the present inventionwithout departing from the spirit or scope of the invention. Thus, it isintended that the present invention cover the modifications andvariations of this invention provided they come within the scope of theappended claims and their equivalents.

The present invention is applicable to those systems which support IEEEstandard 802.16e system.

1. A method of communicating data between a mobile communication deviceand a base station, comprising: frequency multiplexing a tile of a firstcommunication mode with a tile of a second communication mode to createa frequency multiplexed sub-frame, wherein the tile of the firstcommunication mode comprises X₁ contiguous subcarriers and Y₁ contiguousOFDMA symbols, the tile of the second communication mode comprises X₂contiguous subcarriers and Y₂ contiguous OFDMA symbols, and X1=X2 and Y2is a multiple of Y1.
 2. The method of claim 1, wherein the multiple isan integer multiple.
 3. The method of claim 1, wherein the multiple is2.
 4. The method of claim 1, wherein X1=X2=4, Y1=3, and Y2=6
 5. Themethod of claim 1, wherein the first communication mode comprises PUSC(Partial Usage of Sub-Channels) sub-channelization.
 6. The method ofclaim 1, wherein the second communication mode comprises tilepermutation.
 7. The method of claim 1, further comprising: time divisionmultiplexing the frequency multiplexed sub-frame with a second sub-frameof a third communication mode.
 8. The method of claim 7, wherein thethird communication mode comprises adjacent sub-carrier permutation(AMC).
 9. The method of claim 7, wherein the third communication modecomprises distributed sub-carrier permutation.
 10. The method of claim1, further comprising: frequency multiplexing a Physical Resource Unit(PRU) of a third communication mode with a PRU of a fourth communicationmode to create a second frequency multiplexed sub-frame; and timedivision multiplexing the frequency multiplexed sub-frame with thesecond frequency multiplexed sub-frame, wherein the PRU of the thirdcommunication mode comprises X₃ contiguous subcarriers and Y₃ contiguousOFDMA symbols, the PRU of the fourth communication mode comprises X₄contiguous subcarriers and Y₄ contiguous OFDMA symbols, and X3=X4 and Y4is a multiple of Y3.
 11. The method of claim 10, wherein x3=x4=18, y3=3,and y4=6.
 12. The method of claim 10, wherein the third communicationmode comprises adjacent sub-carrier permutation (AMC), and wherein thefourth communication mode comprises adjacent sub-carrier permutation anddistributed sub-carrier permutation.
 13. The method of claim 1, furthercomprising: transmitting the frequency multiplexed sub-frame from themobile communication device to the base station.
 14. A method ofcommunicating data between a mobile communication device and a basestation, comprising: frequency demultiplexing a frequency multiplexedsub-frame to form a tile of a first communication mode and a tile of asecond communication mode, wherein the tile of the first communicationmode comprises X₁ contiguous subcarriers and Y₁ contiguous OFDMAsymbols, the tile of the second communication mode comprises X₂contiguous subcarriers and Y₂ contiguous OFDMA symbols, and X1=X2 and Y2is a multiple of Y1.
 15. The method of claim 14, wherein the multiple isan integer multiple.
 16. The method of claim 14, wherein the multiple is2.
 17. The method of claim 14, wherein X1=X2=4, Y1=3, and Y2=6
 18. Themethod of claim 14, wherein the first communication mode comprises PUSC(Partial Usage of Sub-Channels) sub-channelization.
 19. The method ofclaim 14, wherein the second communication mode comprises tilepermutation.
 20. The method of claim 14, further comprising: timedivision demultiplexing data to obtain the frequency multiplexedsub-frame and a second sub-frame of a third communication mode.
 21. Themethod of claim 20, wherein the third communication mode comprisesadjacent sub-carrier permutation (AMC).
 22. The method of claim 20,wherein the third communication mode comprises distributed sub-carrierpermutation.
 23. The method of claim 14, further comprising: timedivision demultiplexing data to obtain the frequency multiplexedsub-frame and a second frequency multiplexed sub-frame; and frequencydemultiplexing the second frequency multiplexed sub-frame to form aPhysical Resource Unit (PRU) of a third communication mode and a PRU ofa fourth communication mode, wherein the PRU of the third communicationmode comprises X₃ contiguous subcarriers and Y₃ contiguous OFDMAsymbols, the PRU of the fourth communication mode comprises X₄contiguous subcarriers and Y₄ contiguous OFDMA symbols, and X3=X4 and Y4is a multiple of Y3.
 24. The method of claim 23, wherein x3=x4=18, y3=3,and y4=6.
 25. The method of claim 23, wherein the third communicationmode comprises adjacent sub-carrier permutation (AMC), and wherein thefourth communication mode comprises distributed sub-carrier permutation.26. The method of claim 14, further comprising: receiving the frequencymultiplexed sub-frame at the base station from the mobile communicationdevice.
 27. A mobile communication device configured to wirelesslycommunicate with a base station, the mobile communication devicecomprising: a RF unit; and a processor operatively connected to the RFunit and configured to frequency multiplex a tile of a firstcommunication mode with a tile of a second communication mode to createa frequency multiplexed sub-frame, wherein the tile of the firstcommunication mode comprises X₁ contiguous subcarriers and Y₁ contiguousOFDMA symbols, the tile of the second communication mode comprises X₂contiguous subcarriers and Y₂ contiguous OFDMA symbols, and X1=X2 and Y2is a multiple of Y1.
 28. The mobile communication device of claim 27,wherein the multiple is an integer multiple.
 29. The mobilecommunication device of claim 27, wherein the multiple is
 2. 30. Themobile communication device of claim 27, wherein X1=X2=4, Y1=3, and Y2=631. The mobile communication device of claim 27, wherein the firstcommunication mode comprises PUSC (Partial Usage of Sub-Channels)sub-channelization.
 32. The mobile communication device of claim 27,wherein the second communication mode comprises tile permutation. 33.The mobile communication device of claim 27, wherein the processor isfurther configured to time division multiplex the frequency multiplexedsub-frame with a second sub-frame of a third communication mode.
 34. Themobile communication device of claim 33, wherein the third communicationmode comprises adjacent sub-carrier permutation (AMC).
 35. The mobilecommunication device of claim 33, wherein the third communication modecomprises distributed sub-carrier permutation.
 36. The mobilecommunication device of claim 27, wherein the processor is furtherconfigured to frequency multiplex a Physical Resource Unit (PRU) of athird communication mode with a PRU of a fourth communication mode tocreate a second frequency multiplexed sub-frame; and time divisionmultiplex the frequency multiplexed sub-frame with the second frequencymultiplexed sub-frame, wherein the PRU of the third communication modecomprises X₃ contiguous subcarriers and Y₃ contiguous OFDMA symbols, thePRU of the fourth communication mode comprises X₄ contiguous subcarriersand Y₄ contiguous OFDMA symbols, and X3=X4 and Y4 is a multiple of Y3.37. The mobile communication device of claim 36, wherein x3=x4=18, y3=3,and y4=6.
 38. The mobile communication device of claim 36, wherein thethird communication mode comprises adjacent sub-carrier permutation(AMC), and wherein the fourth communication mode comprises distributedsub-carrier permutation.
 39. The mobile communication device of claim27, wherein the processor is further configured to transmit thefrequency multiplexed sub-frame from the mobile communication device tothe base station.
 40. A base station configured to wirelesslycommunicate with a mobile communication device, the base stationcomprising: a RF unit; and a processor operatively connected to the RFunit and configured to frequency demultiplex a frequency multiplexedsub-frame to form a tile of a first communication mode and a tile of asecond communication mode, wherein the tile of the first communicationmode comprises X₁ contiguous subcarriers and Y₁ contiguous OFDMAsymbols, the tile of the second communication mode comprises X₂contiguous subcarriers and Y₂ contiguous OFDMA symbols, and X1=X2 and Y2is a multiple of Y1.
 41. The base station of claim 40, wherein themultiple is an integer multiple.
 42. The base station of claim 40,wherein the multiple is
 2. 43. The base station of claim 40, whereinX1=X2=4, Y1=3, and Y2=6
 44. The base station of claim 40, wherein thefirst communication mode comprises PUSC (Partial Usage of Sub-Channels)sub-channelization.
 45. The base station of claim 40, wherein the secondcommunication mode comprises tile permutation.
 46. The base station ofclaim 40, wherein the processor is further configured to time divisiondemultiplex data to obtain the frequency multiplexed sub-frame and asecond sub-frame of a third communication mode.
 47. The base station ofclaim 46, wherein the third communication mode comprises adjacentsub-carrier permutation (AMC).
 48. The base station of claim 46, whereinthe third communication mode comprises distributed sub-carrierpermutation.
 49. The base station of claim 40, wherein the processor isfurther configured to: time division demultiplex data to obtain thefrequency multiplexed sub-frame and a second frequency multiplexedsub-frame; and frequency demultiplex the second frequency multiplexedsub-frame to form a Physical Resource Unit (PRU) of a thirdcommunication mode and a PRU of a fourth communication mode, wherein thePRU of the third communication mode comprises X₃ contiguous subcarriersand Y₃ contiguous OFDMA symbols, the PRU of the fourth communicationmode comprises X₄ contiguous subcarriers and Y₄ contiguous OFDMAsymbols, and X3=X4 and Y4 is a multiple of Y3.
 50. The base station ofclaim 49, wherein x3=x4=18, y3=3, and y4=6.
 51. The base station ofclaim 49, wherein the third communication mode comprises adjacentsub-carrier permutation (AMC), and wherein the fourth communication modecomprises distributed sub-carrier permutation.
 52. The base station ofclaim 40, wherein the processor is further configured to receive thefrequency multiplexed sub-frame at the base station from the mobilecommunication device.